Unit 1-Scientific Method

Unit 1-Scientific Method

Multiple Choice

An observation is how a scientisst collects information using the 5 senses?

• True

• False

Multiple Choice

An inference is a conclusion based on

• Data

• Observations

• A hypothesis

Multiple Choice

In a scientific investigation, after the question is defined, the next step is most likely

• formulating a hypothesis

• identifying the needed equipment

• designing an experiment

Multiple Choice

Which statement best describes a controlled experiment?

• It tests the effect of a single independent variable.

• It shows the effect of a dependent variable on an independent variable.

• It avoids the use of variable

Multiple Choice

An explanation of why one group had a placebo sprayed into their nostrils before exposure to the virus

• The placebo is the experimental group

• The group that received the placebo was the control group

Multiple Choice

State why the sample size should be large

• A larger sample size will decrease reliability of the experiment

• A larger sample size will increase validity of the experiment

Multiple Choice

The independent variable in the experminet is what the scientist (I) controls, changes, test

• True

• False

Multiple Choice

Researchers performing a well-designed experiment should base their conclusions on

• the hypothesis of the experiment

• data from repeated trials of the experiment

• results predicted before performing the experiment

Multiple Choice

What is the length of the garden snail in the diagram below, from the beginning of its foot at point A to the end of its foot at point B

• 2.6 cm

• 26 mm

• 26 cm

Multiple Choice

What is the volume of liquid that is being measured?

• 42 mL

• 43 mL

• 46 mL

Multiple Choice

Diagrams, tables, and graphs are used by scientists mainly to

• design a research plan for an experiment

• test a hypothesis

• organize data

Multiple Choice

The dependent variable is ALWAYS graphed on the Y-axis

• True

• False

Multiple Choice

Graphs of the data from laboratory investigations are used to

• observe general trends in the data

• make the observed data more accurate

• help change the original data tables

Multiple Choice

What is the dependent variable in the experiment in the graph below?

• pH

• percent maximum activity of trypsin

Multiple Choice

Although the data used to make this graph was originally entered in a data table, most scientists prefer to see the information in the form of a graph because

• only graphs can be used to predict future trends

• it is possible to put more information in a graph than in a data table

• it is easier to see relationships between variables in a graph than in a data table